Question

define double circulation​

Answer 1

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Double Circulation: In the human heart, blood passes through the heart twice in one cardiac cycle. This type of circulation is called double circulation. Double circulation ensures complete segregation of oxygenated and deoxygenated blood which is necessary for optimum energy production in warm-blooded animals.

Answer 2

Answer:

the majority of mammals utilize a double circulatory system.

this means we have 2loops in our body in our body in which blood circulates.

one is oxygenated meaning oxygen rich,

and the other is deoxygenated.

which meant it has less no. of O2 but a lot of CO2.